Over PHP we're posting already on a wall of a fan page. Now I created another fan page and I want the same app to post on this wall as well. However, it gives me the same error all the time:

'FacebookRestClientException' with message 'The user hasn't authorized the application to perform this action'

The script perfectly posts with the same app on the old page.

I've used already all the links I could find to give permissions to the app for posting on the page's wall. I even got a "Success" but the PHP script answers still with the same error. I know that FB changes the links sometimes.

Apparently they're trying to make it harder and harder, so maybe someone knows links that work giving the right permissions!?